| Gulf Telephone Company | - | Monroe, LA | Active |
| Gunnison Tel. Co. | Gunnison Telephone Company | Gunnison, UT | Active |
| H & B Communications Inc. | H & B Communications | Holyrood, KS | Active |
| Hager Telecom Inc. | Hager Telecom, Inc. | Blue Earth, MN | Active |
| Halstad Tel. Co. | Halstad Telephone Company | Halstad, MN | Active |
| Hamilton County Telephone CO-OP | - | Dahlgren, IL | Active |
| Hamilton Tel. Co. | Hamilton Telecommunications | Aurora, NE | Active |
| Hampden Telephone Co. | TDS Telecom | Madison, WI | Active |
| Hancock Rural Tel. Corp. | NineStar Connect | Greenfield, IN | Active |
| Hancock Tel. Co. | The Hancock Telephone Company | Hancock, NY | Active |
| Hanksville Telcom, Inc. | - | Orangeville, UT | Active |
| Happy Valley Telephone Co. | TDS Telecom | Madison, WI | Active |
| Hardy Telecommunications, Inc. | - | Lost River, WV | Active |
| Hargray Tel. Co. Inc. | Hargray Telephone Company, Inc. | Hilton Head Island, SC | Active |
| Harmony Tel. Co. | Harmony Telephone Company | Harmony, MN | Active |
| Harrisonville Tel. Co. | Harrisonville Telephone Company | Waterloo, IL | Active |
| Hart Telephone Company, Inc. | Hart Telephone Company | Hartwell, GA | Active |
| Hartington Tel. Co. | Hartington Telecommunications Co., Inc. | Hartington, NE | Active |
| Hartland & St. Albans Tel. Co. | TDS Telecom | Madison, WI | Active |
| Hartman Tel. Exch. Inc. | Hartman Telephone Exchanges, Inc. | Benkelman, NE | Active |
| Hat Island Tel. Co. | - | Langley, WA | Active |
| Haviland Tel. Co. Inc. | Haviland Telephone Company | Haviland, KS | Active |
| Hawaiian Telcom, Inc. | - | Cincinnati, OH | Active |
| Hawkeye Tel. Co. | Hawkeye Telephone Company | Hawkeye, IA | Active |
| Haxtun Tel. Co. | Haxtun Telephone Company | MACCLENY, FL | Active |
| Hayneville Tel. Co. Inc. | Hayneville Telephone Company, Inc. | Hayneville, AL | Active |
| Heart of Iowa Communications Cooperative | - | Union, IA | Active |
| Heartland Telecommunications Company of Iowa | Premier Communications | Sioux Center, IA | Active |
| Heath Springs Tel. Co.dba Comporium Communications | Heath Springs Telephone Company, Inc. | Rock Hill, SC | Inactive |
| Helix Tel. Co. | Helix Telephone Company | Helix, OR | Active |
| Hemingford Cooperative Telephone Company | Hemingford Co-Operative Telephone Co. | Hemingford, NE | Active |
| Henderson Coop. Tel. Co. | Mainstay Communications | Henderson, NE | Active |
| Henry County Tel. Co. | Henry County Telephone Company | Geneseo, IL | Active |
| Hershey Coop. Tel. Co. | Hershey Cooperative Telephone Company | Hershey, NE | Active |
| Hiawatha Telephone Company | - | Munising, MI | Active |
| Hickory Telphone Company | Hickory Telephone Company | Hickory, PA | Active |
| Highland Tel. Coop. | Highland Telephone Cooperative | Monterey, VA | Active |
| Highland Tel. Coop. Inc. | Highland Telephone Cooperative, Inc. | Sunbright, TN | Active |
| Hill Country Tel. Coop. Inc. | Hill Country Telephone Cooperative, Inc. | Ingram, TX | Active |
| Hills Telelephone Co. Inc. | Hills Telephone Company, Inc. | Garretson, SD | Inactive |
| Hillsboro Tel. Co. Inc. | Hillsboro Telephone Company, Inc. | Hillsboro, WI | Active |
| Hollis Telephone Company, Inc | TDS Telecom | Madison, WI | Active |
| Holway Telephone Company | - | Blair, NE | Active |
| Home Tel. Co. Inc. | Home Telephone Company, Inc. | Galva, KS | Active |
| Home Telephone Co. | - | MT Vernon, OR | Active |
| Home Telephone Co. | Home Telephone Company | St Jacob, IL | Active |
| Home Telephone Company of Pittsboro | TDS Telecom | Madison, WI | Active |
| Home Telephone Company, Inc. | TDS Telecom | Madison, WI | Active |
| Home Telephone ILEC, LLC | - | Moncks Corner, SC | Active |
| Hood Canal Tel. Co., Inc. | Hood Canal Communications | Union, WA | Active |